I don't think it plays a significant role. Many over here buy a Model S for environmental or tax reasons. From a performance standpoint, the car is not ready yet for prime time since "at speed" it is not on par with German brands. No drag strips over here, only race tracks. Highway passing power is what counts. But that doesn't mean a P85D or P90D is not a lot of fun at the traffic lights. So people that want to have their personal roller coaster will buy one anyway.
The market for supersonic jets is quite small. What I do believe is that Tesla is selling less Ps in Europe because a regular D will perform almost as good at highway speeds and costs a lot less. If the Ps would perform better at highway speeds, this would change.